-40 RV Anti Freeze

[Grandpa_Joe]

I have been winterizing my class c by first blowing out the lines and then pumping RV anti-freeze into all the lines, traps, etc. I then pour about 1/2 gallon into the toilet. We had a cold snap where tempertures hit close to zero for a few nights and I noticed that the antifreeze in the toilet was almost frozen; went in to run the generator for 2 hours; it was more of a hard slush than solid. Hopefully it does not get to the point where it expands before truly freezing. Have not had any issues in the past 4 years. Any thoughts?

[Harvey51]

RV toilets don't have an S trap - just a straight pipe. All you need is half a cup of antifreeze in the bowl.

Yes, I see my extra jugs of antifreeze are pretty slushy now, at -20 C. But it doesn't seem to have expanded.

[M_GO_BLUE1]

RV antifreeze does not expand...

[SkiingSixPack]

RV pink stuff will not expand when it freezes. Water is one of only a small number of substances that can expand when it reaches the frozen state ....

It "slushes", but does not expand.

[BTPO1]

ChooChooMan74 wrote:
RV antifreeze will slush up, but it isn't suppose to expand like water when it does. The expansion of water is what destroys things.

x2, water expansion will destroy when it can't go anywhere. JMO

[ChooChooMan74]

RV antifreeze will slush up, but it isn't suppose to expand like water when it does. The expansion of water is what destroys things.

[Grandpa_Joe]

I have also noticed this with -20 and -40 windshield washer fluid, perhaps from water being a component? I never dilute.

[carringb]

RV antifreeze does get slushy. As long as it doesn't freeze solid you are OK.

[pianotuna]

Hi,

Do not dilute RV antifreeze : testing RV antifreeze